import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/User.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import List from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'

Vue.use(VueRouter)

  const routes = [
    {
      path:'/',
      redirect:'/login'
    },
    {
      path:'/login',
      component:Login
    },
    {
      path:'/home',
      component:Home,
      redirect:'/welcome',
      children:[
        {
          path:'/welcome',
          component:Welcome
        },
        {
          path:'/users',
          component:Users
        },
        {
          path:'/rights',
          component:Rights
        },
        {
          path:'/roles',
          component:Roles
        },
        {
          path:'/categories',
          component:Cate
        },
        {
          path:'/params',
          component:Params
        },
        {
          path:'/goods',
          component:List
        },
        {
          path:'/goods/add',
          component:Add
        }
      ]
    },
]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
      // next()函数有两种模式，next()直接放行，next('/path')强制跳转
      if(to.path === '/login') return next();
      const tokenstr = window.sessionStorage.getItem('token');
      // 如果tokenstr是个空串，则是没有登录，转成布尔值是false
      if(!tokenstr) return next('/login');
      next();
})


export default router
